<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>

  <script src="./lib/vue.js"></script>
</body>

</html>
<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="./lib/vue.js"></script>
</head>

<body>
  <div id="app">
    <!-- 单个复选框，data中的数据源为布尔类型 -->
    <input type="checkbox" v-model="checked">{{checked?'取消全选':'全选'}}
  </div>

  <script>
    let vm = new Vue({
      el: '#app',
      data: {
        checked: true
      }
    })
  </script>
</body>

</html>